Collapsible structure



FIG. 1 is an elevational view of a collapsible structure in a fully collapsed configuration showing my new design;

FIG. 2 is a reduced perspective view in a partially collapsed configuration thereof;

FIG. 3 is a further reduced perspective view in another partially collapsed configuration thereof;

FIG. 4 is a further reduced perspective view in an erected configuration thereof;

FIG. 5 is an enlarged partial perspective view of the apex of the collapsible structure shown in the partially collapsed configuration of FIG. 3;

FIG. 6 is an enlarged partial perspective view from beneath the apex of the collapsible structure shown in the erected configuration of FIG. 4;

FIG. 7 is an enlarged partial perspective view of a hinge of the collapsible structure shown in the partially collapsed configuration of FIG. 3; and,

FIG. 8 is an enlarged partial perspective view of a hinge of the collapsible structure shown in the erected configuration of FIG. 4. 

The ornamental design for a collapsible structure, as shown and described. 